Commit Graph

55 Commits

Author SHA1 Message Date
Junio C Hamano
638cbf5f0f Merge branch 'jg/cguide-we-cannot-count'
* jg/cguide-we-cannot-count:
  CodingGuidelines: update 'rough' rule count
2015-04-14 09:55:29 -07:00
Julian Gindi
6c3b2afe6f CodingGuidelines: update 'rough' rule count
Changed inaccurate count of "rough rules" from three to the more
generic 'a few'.

Signed-off-by: Julian Gindi <juliangindi@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-04-14 09:50:31 -07:00
Nguyễn Thái Ngọc Duy
da0005b885 *config.txt: stick to camelCase naming convention
This should improve readability. Compare "thislongname" and
"thisLongName". The following keys are left in unchanged. We can
decide what to do with them later.

 - am.keepcr
 - core.autocrlf .safecrlf .trustctime
 - diff.dirstat .noprefix
 - gitcvs.usecrlfattr
 - gui.blamehistoryctx .trustmtime
 - pull.twohead
 - receive.autogc
 - sendemail.signedoffbycc .smtpsslcertpath .suppresscc

Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-03-13 22:13:46 -07:00
Junio C Hamano
9a9c1f1fdf Merge branch 'jc/conf-var-doc'
Longstanding configuration variable naming rules has been added to
the documentation.

* jc/conf-var-doc:
  CodingGuidelines: describe naming rules for configuration variables
  config.txt: mark deprecated variables more prominently
  config.txt: clarify that add.ignore-errors is deprecated
2015-02-22 12:28:31 -08:00
Junio C Hamano
bb831db677 Merge branch 'ah/usage-strings'
* ah/usage-strings:
  standardize usage info string format
2015-02-11 13:44:20 -08:00
Junio C Hamano
fcae987e94 Merge branch 'jc/coding-guidelines'
* jc/coding-guidelines:
  CodingGuidelines: clarify C #include rules
2015-02-11 13:37:42 -08:00
Junio C Hamano
35840a3e78 CodingGuidelines: describe naming rules for configuration variables
We may want to say something about command line option names in the
new section as well, but for now, let's make sure everybody is clear
on how to structure and name their configuration variables.

The text for the rules are partly taken from the log message of
Jonathan's 6b3020a2 (add: introduce add.ignoreerrors synonym for
add.ignore-errors, 2010-12-01).

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-02-02 11:28:55 -08:00
Junio C Hamano
412cb2ec13 CodingGuidelines: clarify C #include rules
Even though "advice.h" includes "git-compat-util.h", it is not
sensible to have it as the first #include and indirectly satisify
the "You must give git-compat-util.h a clean environment to set up
feature test macros before including any of the system headers are
included", which is the real requirement.

Because:

 - A command that interacts with the object store, config subsystem,
   the index, or the working tree cannot do anything without using
   what is declared in "cache.h";

 - A built-in command must be declared in "builtin.h", so anything
   in builtin/*.c must include it;

 - These two headers both include "git-compat-util.h" as the first
   thing; and

 - Almost all our *.c files (outside compat/ and borrowed files in
   xdiff/) need some Git-ness from "cache.h" to do something
   Git-ish.

let's explicitly specify that one of these three header files must
be the first thing that is included.

Any of our *.c file should include the header file that directly
declares what it uses, instead of relying on the fact that some *.h
file it includes happens to include another *.h file that declares
the necessary function or type.  Spell it out as another guideline
item.

Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-01-15 15:42:50 -08:00
Alex Henrie
9c9b4f2f8b standardize usage info string format
This patch puts the usage info strings that were not already in docopt-
like format into docopt-like format, which will be a litle easier for
end users and a lot easier for translators. Changes include:

- Placing angle brackets around fill-in-the-blank parameters
- Putting dashes in multiword parameter names
- Adding spaces to [-f|--foobar] to make [-f | --foobar]
- Replacing <foobar>* with [<foobar>...]

Signed-off-by: Alex Henrie <alexhenrie24@gmail.com>
Reviewed-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-01-14 09:32:04 -08:00
Junio C Hamano
7591e2c53c Merge branch 'po/error-message-style'
* po/error-message-style:
  doc: give some guidelines for error messages
2014-07-16 11:33:03 -07:00
Philip Oakley
0ae0e882b2 doc: give some guidelines for error messages
Clarify error message puntuation to reduce review workload.

Signed-off-by: Philip Oakley <philipoakley@iee.org>
Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-07-10 13:31:55 -07:00
Junio C Hamano
897f964c0d CodingGuidelines: avoid "test <cond> -a/-o <cond>"
The construct is error-prone; "test" being built-in in most modern
shells, the reason to avoid "test <cond> && test <cond>" spawning
one extra process by using a single "test <cond> -a <cond>" no
longer exists.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-05-20 11:19:43 -07:00
Junio C Hamano
f26443da04 CodingGuidelines: on splitting a long line
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-05-02 14:08:16 -07:00
Junio C Hamano
5db9ab82b9 CodingGuidelines: on comparison
There are arguments for writing a conditional as "a < b" rather than
"b > a", or vice versa.  Let's give guidance on which we prefer.

See http://thread.gmane.org/gmane.comp.version-control.git/3903/focus=4126
for the original discussion.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-05-02 13:44:46 -07:00
Junio C Hamano
691d0dd0a9 CodingGuidelines: do not call the conditional statement "if()"
The point immediately before it is about having SP after the control
keyword.  Spell it out as 'an "if" statement' instead.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-05-02 13:26:07 -07:00
Junio C Hamano
6117a3d494 CodingGuidelines: give an example for shell function preamble
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-05-02 13:24:57 -07:00
Junio C Hamano
9dbe780174 CodingGuidelines: give an example for control statements
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-05-02 13:24:57 -07:00
Junio C Hamano
6a49909b52 CodingGuidelines: give an example for redirection
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-05-02 13:24:57 -07:00
Junio C Hamano
79fc3ca123 CodingGuidelines: give an example for case/esac statement
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-05-02 13:24:57 -07:00
Junio C Hamano
dd30800bcd CodingGuidelines: once it is in, it is not worth the code churn
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-05-02 13:24:57 -07:00
Junio C Hamano
cbcfd4e3ea i18n: mention "TRANSLATORS:" marker in Documentation/CodingGuidelines
These comments have to have "TRANSLATORS: " at the very beginning
and have to deviate from the usual multi-line comment formatting
convention.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-04-18 10:48:49 -07:00
Junio C Hamano
d59c12d7ad Merge branch 'jl/nor-or-nand-and'
Eradicate mistaken use of "nor" (that is, essentially "nor" used
not in "neither A nor B" ;-)) from in-code comments, command output
strings, and documentations.

* jl/nor-or-nand-and:
  code and test: fix misuses of "nor"
  comments: fix misuses of "nor"
  contrib: fix misuses of "nor"
  Documentation: fix misuses of "nor"
2014-04-08 12:00:28 -07:00
Justin Lebar
a58088abe2 Documentation: fix misuses of "nor"
Signed-off-by: Justin Lebar <jlebar@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-03-31 15:16:22 -07:00
Jeff King
f57b6cfdf7 CodingGuidelines: mention C whitespace rules
We are fairly consistent about these, so most are covered by
"follow existing style", but it doesn't hurt to be explicit.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-02-28 12:53:50 -08:00
Junio C Hamano
5712dcb209 Merge branch 'jj/doc-markup-hints-in-coding-guidelines' into maint
* jj/doc-markup-hints-in-coding-guidelines:
  State correct usage of literal examples in man pages in the coding standards
2013-12-17 11:36:10 -08:00
Junio C Hamano
f0c9253ef9 Merge branch 'jj/doc-markup-hints-in-coding-guidelines'
* jj/doc-markup-hints-in-coding-guidelines:
  State correct usage of literal examples in man pages in the coding standards
2013-12-03 11:41:44 -08:00
Jason St. John
ca03c3682a State correct usage of literal examples in man pages in the coding standards
The man pages contain inconsistent usage of backticks vs. single quotes
around options, commands, etc. that are in paragraphs. This commit states
that backticks should always be used around literal examples.

This commit states that "--" and friends should not be escaped
(e.g. use `--pretty=oneline` instead of `\--pretty=oneline`).

This commit also states correct usage for typesetting command usage
examples with inline substitutions.

Thanks-to: Ramkumar Ramachandra <artagnon@gmail.com>
Thanks-to: Stuart Rackham <srackham@gmail.com>
Thanks-to: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Jason St. John <jstjohn@purdue.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-11-18 13:30:51 -08:00
brian m. carlson
b75a6ca7f3 CodingGuidelines: style for multi-line comments
The style for multi-line comments is often mentioned and should be documented
for clarity.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
2013-10-14 12:48:06 -07:00
Marc Branchaud
42e0fae98e Provide some linguistic guidance for the documentation.
This will hopefully avoid questions over which spelling and grammar should
be used.  Translators are of course free to create localizations for
specific English dialects.

Signed-off-by: Marc Branchaud <marcnarc@xiplink.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-08-01 13:13:52 -07:00
Dale Worley
48bc1755b6 CodingGuidelines: Documentation/*.txt are the sources
People not familiar with AsciiDoc may not realize they are
supposed to update *.txt files and not *.html/*.1 files when
preparing patches to the project.

Signed-off-by: Dale Worley <worley@ariadne.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-05-10 12:13:08 -07:00
Junio C Hamano
bb9f2aecf0 CodingGuidelines: our documents are in AsciiDoc
Before talking about notations such as optional [--option] enclosed
in brackets, state that the documents are in AsciiDoc and processed
into other formats.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-21 14:17:32 -07:00
Junio C Hamano
07203d6b6c Merge branch 'tz/perl-styles'
Add coding guidelines for writing Perl scripts for Git.

* tz/perl-styles:
  Update CodingGuidelines for Perl
2013-02-14 10:28:55 -08:00
Junio C Hamano
41e81d2fb9 Merge branch 'jk/python-styles'
* jk/python-styles:
  CodingGuidelines: add Python coding guidelines
2013-02-07 14:41:31 -08:00
Ted Zlatanov
c5e366b1f8 Update CodingGuidelines for Perl
Add the coding guidelines for Perl.

Signed-off-by: Ted Zlatanov <tzz@lifelogs.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-02-06 14:02:03 -08:00
Thomas Ackermann
2de9b71138 Documentation: the name of the system is 'Git', not 'git'
Signed-off-by: Thomas Ackermann <th.acker@arcor.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-02-01 13:53:33 -08:00
Thomas Ackermann
48a8c26c62 Documentation: avoid poor-man's small caps GIT
In the earlier days, we used to spell the name of the system as GIT,
to simulate as if it were typeset with capital G and IT in small
caps.  Later we stopped doing so at around 1.6.5 days.

Let's stop doing so throughout the documentation.  The name to refer
to the whole system (and the concept it embodies) is "Git"; the
command end-users type is "git".  And document this in the coding
guideline.

Signed-off-by: Thomas Ackermann <th.acker@arcor.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-02-01 13:53:25 -08:00
John Keeping
9ef43dd7ad CodingGuidelines: add Python coding guidelines
These are kept short by simply deferring to PEP-8.  Most of the Python
code in Git is already very close to this style (some things in contrib/
are not).

Rationale for version suggestions:

 - Amongst the noise in [1], there isn't any disagreement about using
   2.6 as a base (see also [2]), although Brandon Casey recently added
   support for 2.4 and 2.5 to git-p4 [3].

 - Restricting ourselves to 2.6+ makes aiming for Python 3 compatibility
   significantly easier [4].

 - Advocating Python 3 support in all scripts is currently unrealistic
   because:

     - 'p4 -G' provides output in a format that is very hard to use with
       Python 3 (and its documentation claims Python 3 is unsupported).

     - Mercurial does not support Python 3.

     - Bazaar does not support Python 3.

 - But we should try to make new scripts compatible with Python 3
   because all new Python development is happening on version 3 and the
   Python community will eventually stop supporting Python 2 [5].

 - Python 3.1 is required to support the 'surrogateescape' error handler
   for encoding/decodng filenames to/from Unicode strings and Python 3.0
   is not longer supported.

[1] http://thread.gmane.org/gmane.comp.version-control.git/210329
[2] http://article.gmane.org/gmane.comp.version-control.git/210429
[3] http://thread.gmane.org/gmane.comp.version-control.git/214579
[4] http://docs.python.org/3.3/howto/pyporting.html#try-to-support-python-2-6-and-newer-only
[5] http://www.python.org/dev/peps/pep-0404/

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-30 12:49:28 -08:00
Adam Spiers
a26fd033af Documentation: move support for old compilers to CodingGuidelines
The "Try to be nice to older C compilers" text is clearly a guideline
to be borne in mind whilst coding rather than when submitting patches.

Signed-off-by: Adam Spiers <git@adamspiers.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-12-16 18:30:53 -08:00
Heiko Voigt
03b05c7db5 Documentation/CodingGuidelines: spell out more shell guidelines
In earlier days, "imitate the style in the neibouring code" was
sufficient to keep the coherent style, but over time some parts of
the codebase have drifted enough to make it ineffective.

Spell some of the guidelines out.

Signed-off-by: Heiko Voigt <hvoigt@hvoigt.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-08-15 11:00:39 -07:00
Tim Henigan
860f70f9f4 CodingGuidelines: do not use 'which' in shell scripts
During the code review of a recent patch, it was noted that shell scripts
must not use 'which $cmd' to check the availability of the command $cmd.
The output of the command is not machine parseable and its exit code is
not reliable across platforms.

It is better to use 'type' to accomplish this task.

Signed-off-by: Tim Henigan <tim.henigan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-02-27 15:10:23 -08:00
Tim Henigan
48f359bfaf CodingGuidelines: Add a note about spaces after redirection
During code review of some patches, it was noted that redirection operators
should have space before, but no space after them.

Signed-off-by: Tim Henigan <tim.henigan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-02-27 12:41:13 -08:00
Ævar Arnfjörð Bjarmason
5e9637c629 i18n: add infrastructure for translating Git with gettext
Change the skeleton implementation of i18n in Git to one that can show
localized strings to users for our C, Shell and Perl programs using
either GNU libintl or the Solaris gettext implementation.

This new internationalization support is enabled by default. If
gettext isn't available, or if Git is compiled with
NO_GETTEXT=YesPlease, Git falls back on its current behavior of
showing interface messages in English. When using the autoconf script
we'll auto-detect if the gettext libraries are installed and act
appropriately.

This change is somewhat large because as well as adding a C, Shell and
Perl i18n interface we're adding a lot of tests for them, and for
those tests to work we need a skeleton PO file to actually test
translations. A minimal Icelandic translation is included for this
purpose. Icelandic includes multi-byte characters which makes it easy
to test various edge cases, and it's a language I happen to
understand.

The rest of the commit message goes into detail about various
sub-parts of this commit.

= Installation

Gettext .mo files will be installed and looked for in the standard
$(prefix)/share/locale path. GIT_TEXTDOMAINDIR can also be set to
override that, but that's only intended to be used to test Git itself.

= Perl

Perl code that's to be localized should use the new Git::I18n
module. It imports a __ function into the caller's package by default.

Instead of using the high level Locale::TextDomain interface I've
opted to use the low-level (equivalent to the C interface)
Locale::Messages module, which Locale::TextDomain itself uses.

Locale::TextDomain does a lot of redundant work we don't need, and
some of it would potentially introduce bugs. It tries to set the
$TEXTDOMAIN based on package of the caller, and has its own
hardcoded paths where it'll search for messages.

I found it easier just to completely avoid it rather than try to
circumvent its behavior. In any case, this is an issue wholly
internal Git::I18N. Its guts can be changed later if that's deemed
necessary.

See <AANLkTilYD_NyIZMyj9dHtVk-ylVBfvyxpCC7982LWnVd@mail.gmail.com> for
a further elaboration on this topic.

= Shell

Shell code that's to be localized should use the git-sh-i18n
library. It's basically just a wrapper for the system's gettext.sh.

If gettext.sh isn't available we'll fall back on gettext(1) if it's
available. The latter is available without the former on Solaris,
which has its own non-GNU gettext implementation. We also need to
emulate eval_gettext() there.

If neither are present we'll use a dumb printf(1) fall-through
wrapper.

= About libcharset.h and langinfo.h

We use libcharset to query the character set of the current locale if
it's available. I.e. we'll use it instead of nl_langinfo if
HAVE_LIBCHARSET_H is set.

The GNU gettext manual recommends using langinfo.h's
nl_langinfo(CODESET) to acquire the current character set, but on
systems that have libcharset.h's locale_charset() using the latter is
either saner, or the only option on those systems.

GNU and Solaris have a nl_langinfo(CODESET), FreeBSD can use either,
but MinGW and some others need to use libcharset.h's locale_charset()
instead.

=Credits

This patch is based on work by Jeff Epler <jepler@unpythonic.net> who
did the initial Makefile / C work, and a lot of comments from the Git
mailing list, including Jonathan Nieder, Jakub Narebski, Johannes
Sixt, Erik Faye-Lund, Peter Krefting, Junio C Hamano, Thomas Rast and
others.

[jc: squashed a small Makefile fix from Ramsay]

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-12-05 20:46:55 -08:00
Junio C Hamano
b1afe49dfb CodingGuidelines: downcase placeholders in usage messages
We accumulated some inconsistencies without an explicit guidance to spell
this out over time.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-02-15 11:53:00 -08:00
Ralf Wildenhues
469bfc962d Fix typos in the documentation
Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-01-04 11:23:42 -08:00
Junio C Hamano
45a7b55d6f Merge branch 'sn/diff-doc'
* sn/diff-doc:
  docs: clarify git diff modes of operation
  diff,difftool: Don't use the {0,2} notation in usage strings
  CodingGuidelines: Add a section on writing documentation
2010-12-03 16:10:36 -08:00
Giuseppe Bilotta
f36a4fa8ef CodingGuidelines: mention whitespace preferences for shell scripts
Signed-off-by: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-12-03 15:22:59 -08:00
Štěpán Němec
c455bd8950 CodingGuidelines: Add a section on writing documentation
Provide a few examples on argument and option notation in usage strings
and command synopses.

Signed-off-by: Štěpán Němec <stepnem@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-11-05 10:03:17 -07:00
Junio C Hamano
bc97994530 CodingGuidelines: reword parameter expansion section
Group entries related to parameter substitutions together and avoid
using the word "regexp" to refer to the ${parameter/pattern/string}
substitution (banned), as the pattern there is a shell glob and not
a regular expression.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-10-13 11:15:14 -07:00
Junio C Hamano
055467dd4a CodingGuidelines: spell Arithmetic Expansion with $(($var))
POSIX wants shells to support both "N" and "$N" and requires them to yield
the same answer to $((N)) and $(($N)), but we should aim for portability
in a case like this, especially when the price we pay to do so is so
small, i.e. a few extra dollars.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-09-27 10:45:29 -07:00
Kjetil Barvik
571998921d lstat_cache(): swap func(length, string) into func(string, length)
Swap function argument pair (length, string) into (string, length) to
conform with the commonly used order inside the GIT source code.

Also, add a note about this fact into the coding guidelines.

Signed-off-by: Kjetil Barvik <barvik@broadpark.no>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-02-09 20:59:26 -08:00